Develop Reference

How to fix JSONException Error in Volley library?

I am trying to send a JSON object request with two parameters and in response trying to get an array from the api call. However, I am getting exception parse error in Error listener. A post request is sent when the button is clicked. The func takes two parameters but fails to get response, the function directly goes to on response error listener
private void validate_log(String num) {
/*buttonNumCheck.setVisibility(View.INVISIBLE);
final ProgressBar pBar=(ProgressBar)findViewById(R.id.progressBarLogin);
pBar.setVisibility(View.VISIBLE);*/
buttonNumCheck.setInProgress(true);
buttonNumCheck.setEnabled(false);
final String Org_id="81";
final String url="http://xya/api";
RequestQueue rq=Volley.newRequestQueue(this);
JSONObject js=new JSONObject();
try {
js.put("parm1", num);
js.put("parm2", Org_id);
final String requestBody=js.toString();
} catch (JSONException e) {
e.printStackTrace();
}
JsonObjectRequest jsonObjReq=new JsonObjectRequest(
Request.Method.POST, url, js,
new Response.Listener<JSONObject>() {
public void onResponse(JSONObject response) {
buttonNumCheck.setEnabled(true);
buttonNumCheck.setInProgress(false);
String stresponse=response.toString();
Toast.makeText(getApplicationContext(),"REPOSE="+response,Toast.LENGTH_SHORT).show();
System.out.println("RESPONSE= "+response);
try {
JSONArray heroArray = response.getJSONArray("");
// Toast.makeText(DeviceCheck_Activity.this, "Welcome Back"+ [1], Toast.LENGTH_LONG).show();
} catch (JSONException e) {
e.printStackTrace();
Log.e("Error", "Response Error", e);
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(DeviceCheck_Activity.this, "Response error= " + error, Toast.LENGTH_LONG).show();
/*mdToast=MDToast.makeText(getApplicationContext(), "Oops something went wrong!!",
Toast.LENGTH_SHORT, MDToast.TYPE_ERROR);
mdToast.show();*/
buttonNumCheck.setInProgress(false);
buttonNumCheck.setEnabled(true);
Log.e("Error", "Response Error", error);
}
}) {
#Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers=new HashMap<String, String>();
headers.put("Content-Type", "application/json; charset=utf-8");
return headers;
}
};
jsonObjReq.setShouldCache(false);
jsonObjReq.setRetryPolicy(new DefaultRetryPolicy(20 * 1000, 0, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
rq.add(jsonObjReq);
}
The error response I am getting is
com.android.volley.ParseError: org.json.JSONException: Value [{"store_id":11,"store_name":"Gomati District Main Store"},{"store_id":13,"store_name":"Main Seed Store"}] of type org.json.JSONArray cannot be converted to JSONObject

Your Problem can be solved in 2 ways :
First:)
Using JSONArrayRequest instead of JSONbjectRequest.
Your JSONObjectRequest returns an JSONObject response while your response is an JSONArray therefore java can not convert it and your application crashes.
Change you request as below:
JSONArrayRequest jsonArrReq=new JSONArrayRequest(//changed
Request.Method.POST, url, js,
new Response.Listener<JSONArray>() {
public void onResponse(JSONArray response) {
JSONArray heroArray = response;//changeed
/* rest of your code */
} catch (JSONException e) {
e.printStackTrace();
Log.e("Error", "Response Error", e);
}
}
},
jsonArrReq.setShouldCache(false);
jsonArrReq.setRetryPolicy(new DefaultRetryPolicy(20 * 1000, 0, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
rq.add(jsonArrReq);
Second :)
Using StringRequest instead of JSONObjectRequest. String request returns an String response which lets you do what ever you want with your response.
Change you request as below :
StringRequest stringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
JSONArray heroArray = new JSONArray(response);
/* rest of your code */
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("Error", "Response Error", error);
/*rest of your code */
}
}) {
#Override
public byte[] getBody() throws AuthFailureError {
try {
return requestBody == null ? null : js.getBytes("utf-8");
} catch (UnsupportedEncodingException uee) {
VolleyLog.wtf("Unsupported Encoding while trying to get the bytes of %s using %s", js, "utf-8");
return null;
}
}
#Override
protected Response<String> parseNetworkResponse(NetworkResponse response) {
String responseString = "";
if (response != null) {
responseString = String.valueOf(response.statusCode);
// can get more details such as response.headers
}
return Response.success(responseString, HttpHeaderParser.parseCacheHeaders(response));
}
};
}
stringRequest.setShouldCache(false);
stringRequest.setRetryPolicy(new DefaultRetryPolicy(20 * 1000, 0, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
rq.add(stringRequest);

Use the JsonArrayRequest like thisas your response is JsonArray .
JsonArrayRequest jsonObjReq = new JsonArrayRequest(Request.Method.POST, url, js,
new Response.Listener<JSONArray>() {
public void onResponse(JSONArray response) {
buttonNumCheck.setEnabled(true);
buttonNumCheck.setInProgress(false);
String stresponse = response.toString();
try {
for (int i = 0; i < response.length(); i++) {
JSONObject object = response.getJSONObject(i);
String id = object.getString("store_id");
}
} catch (JSONException e) {
e.printStackTrace();
Log.e("Error", "Response Error", e);
}
}
}

Tried all the solutions didn't worked but thank you guys for your help. I actually found the solution from another question posted in stack overflow page. Here is the solution:
RequestQueue requestQueue=Volley.newRequestQueue(getApplicationContext());
StringRequest stringRequest=new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
//JSONArray jsonArray_1=new JSONArray(response);
System.out.println("RESPONSE= " + response);
JSONArray jsonArray=new JSONArray(response);
json_stringarr=new String[jsonArray.length()];
if(jsonArray.length()>0) {
for (int i=0; i < jsonArray.length(); i++) {
JSONObject jsonObject1=jsonArray.getJSONObject(i);
//String web_page=jsonObject1.getString("awb_no");
String store_id=jsonObject1.getString("store_id");
String store_name=jsonObject1.getString("store_name");
json_stringarr[i]=store_id+" - "+store_name;
Toast.makeText(getApplicationContext(), "RESPOBBSE= " + json_stringarr[i], Toast.LENGTH_SHORT).show();
System.out.println("JSON ARRAY=" + json_stringarr[i]);
System.out.println("JSON Object=" + jsonObject1);
}
}
else{
Toast.makeText(getApplicationContext(),"Login ceredentils are incorrect",Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
MDToast mdToast=MDToast.makeText(getApplicationContext(), "Something went wrong!!", Toast.LENGTH_SHORT, MDToast.TYPE_WARNING);
mdToast.show();
error.printStackTrace();
}
}) {
#Override
public byte[] getBody() {
// String body="{\"param1\":"+num+",\"param2\":\"81"\"}";
String body="{\"parm1\":"+num+",\"parm2\":\"81\"}";
return body.getBytes();
}
/*#Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("param1", num);
params.put("param2", Org_id);
return params;
}*/
#Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers=new HashMap<String, String>();
headers.put("Content-Type", "application/json; charset=utf-8");
return headers;
}
};
I did it by sending a String request and then overriding the getBody() method and then it worked like a charm. Thanks again for all your help.

How to pass multiple information array and a image array to server?

I have an array which is contain image quantity for image and another is image size array which is contain image size, also an image array. I'm trying to send them to server but i failed every time. I'm trying many example but nothing was worked for me. Is there any other way to do this ? Please give me some hints or link.
how to send array of params using volley in android
public void uploadMultipleImage(String url, final List<SelectedImageModel> selectedImageModels)
{
VolleyMultipartRequest multipartRequest = new VolleyMultipartRequest(Request.Method.POST, url, new Response.Listener<NetworkResponse>() {
#Override
public void onResponse(NetworkResponse response) {
String resultResponse = new String(response.data);
responseListener.onResultSuccess(resultResponse);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
NetworkResponse networkResponse = error.networkResponse;
String result = new String(networkResponse.data);
responseListener.onResultSuccess(result);
}
}) {
#Override
protected Map<String, String> getParams() {
HashMap<String, String> params = new HashMap<>(selectedImageModels.size());
for(int i=0; i<selectedImageModels.size(); i++)
params.put("size["+i+"]",selectedImageModels.get(i).getPhotoSize());
for(int i=0; i<selectedImageModels.size(); i++)
params.put("quantity["+i+"]",selectedImageModels.get(i).getPhotoQuantity());
return params;
}
#Override
public Map<String, String> getHeaders() {
Map<String, String> headers = new HashMap<>();
headers.put("Authorization", "Bearer "+requiredInfo.getAccessToken());
headers.put("Accept", "application/json");
headers.put("Content-Type", "x-www-form-urlencoded");
return headers;
}
#Override
protected Map<String, DataPart> getByteData() {
Map<String, DataPart> params = new HashMap<>(selectedImageModels.size());
for(int i=0; i<selectedImageModels.size(); i++)
params.put("image["+i+"]",new DataPart("imageName",UserProfile.getFileDataFromDrawable(selectedImageModels.get(i).getPhoto())));
return params;
}
};
requestQueue.add(multipartRequest);
}
Every time i'm getting com.android.volley.server error 500 this error

Make a method for send array of params.
private String makeJsonObjectParams() {
//In mediaData,I am sending image to AWS and I will get the download link and I
// am storing the downloadurl in downloadurl arrayslist.
JSONArray mediaData = new JSONArray();
try {
if(img1 != 1) {
JSONObject temp = new JSONObject();
temp.put("file", download_url.get(0));
temp.put("type", "signature");
mediaData.put(temp);
}
if(img2 != 1){
JSONObject temp1 = new JSONObject();
temp1.put("file", download_url.get(1));
temp1.put("type", "id proof");
mediaData.put(temp1);
}
} catch (JSONException e) {
e.printStackTrace();
}
//for sending normal details like text
JSONObject updateDetails = new JSONObject();
try {
updateDetails.put("status", 2);
updateDetails.put("userId", sharedPreferences.getString("user_ID",""));
updateDetails.put("deviceToken", splash_screen.android_id);
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject jsonVerificationDetails = new JSONObject();
try {
jsonVerificationDetails.put("type", verificatin_type);
jsonVerificationDetails.put("durationOfStay", durationOfStay.getText().toString());
jsonVerificationDetails.put("media", mediaData);
} catch (JSONException e) {
e.printStackTrace();
}
JSONObject jsonBody = new JSONObject();
try {
jsonBody.put("verificationDetails", jsonVerificationDetails);
jsonBody.put("updateDetails", updateDetails);
} catch (JSONException e) {
e.printStackTrace();
}
final String mRequestBody = jsonBody.toString();
return mRequestBody;
}
}
Through the below code send the code to server.
void submitData(){
try {
RequestQueue requestQueue = Volley.newRequestQueue(MainActivity.this);
final String mRequestBody = makeJsonObjectParams();
StringRequest stringRequest = new StringRequest(Request.Method.POST, completedTaskUrl, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
//do whatever you want
}
} catch (JSONException e) {
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
}) {
#Override
public String getBodyContentType() {
return "application/json; charset=utf-8";
}
#Override
public byte[] getBody() throws AuthFailureError {
try {
return mRequestBody == null ? null : mRequestBody.getBytes("utf-8");
} catch (UnsupportedEncodingException uee) {
VolleyLog.wtf("Unsupported Encoding while trying to get the bytes of %s using %s", mRequestBody, "utf-8");
return null;
}
}
#Override
protected Response<String> parseNetworkResponse(NetworkResponse response) {
String responseString = "";
if (response != null) {
responseString = String.valueOf(response.statusCode);
}
// return Response.success(responseString, HttpHeaderParser.parseCacheHeaders(response));
return super.parseNetworkResponse(response);
}
};
requestQueue=Volley.newRequestQueue(getApplicationContext());
requestQueue.add(stringRequest);
} catch (Exception e) {//JSONException e
e.printStackTrace();
}
}

Best way to call Volley network call multiple times

I have one requirement, where I have to call Volley POST method near about 300-500 times. In post I am sending JSONObject and in response I am getting String as output. But my problem is when I call volley on some devices I am getting java.lang.OutOfMemoryError because calling service more than 300 times. Following is my code:
for (int i=0;i<myJsonArr.length();i++) // here myJsonArr may contains 300-500 json object
{
customRequestTest(allAppJson.getJSONObject(i));
}
public void customRequestTest(JSONObject jsonObject)
{
try {
String myURL = "My URL";
RequestQueue requestQueue = Volley.newRequestQueue(this);
final String mRequestBody = jsonObject.toString();
System.out.println (">>>>>>>>>>mRequestBody"+mRequestBody);
StringRequest stringRequest = new StringRequest(Request.Method.POST, myURL, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Log.i("LOG_RESPONSE", response);
System.out.println (">>>>>>>>onResponse"+response +" for request "+mRequestBody);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("LOG_RESPONSE", error.toString());
System.out.println (">>>>>>>>onErrorResponse"+error.toString()+" for request "+mRequestBody);
}
}) {
#Override
public String getBodyContentType() {
return "application/json; charset=utf-8";
}
#Override
public byte[] getBody() throws AuthFailureError {
try {
return mRequestBody == null ? null : mRequestBody.getBytes("utf-8");
} catch (UnsupportedEncodingException uee) {
VolleyLog.wtf("Unsupported Encoding while trying to get the bytes of %s using %s", mRequestBody, "utf-8");
return null;
}
}
#Override
protected Response<String> parseNetworkResponse(NetworkResponse response) {
String responseString = "";
if (response != null) {
String str = new String(response.data);
responseString = str;
}
return Response.success(responseString, HttpHeaderParser.parseCacheHeaders(response));
}
};
requestQueue.add(stringRequest);
} catch (Exception e) {
System.out.println (">>>>>>>>Inside catch of customRequestTest");
e.printStackTrace();
}
}
getting Out of memory erorr at : RequestQueue requestQueue = Volley.newRequestQueue(this);

How to send a POST request with JSON body using Volley?

How to pass these parameter into POST method using Volley library.
API link: http://api.wego.com/flights/api/k/2/searches?api_key=12345&ts_code=123
Screenshot of JSON structure
I tried this but again facing error.
StringEntity params= new StringEntity ("{\"trip\":\"[\"{\"departure_code\":\","
+departure,"arrival_code\":\"+"+arrival+","+"outbound_date\":\","
+outbound,"inbound_date\":\","+inbound+"}\"]\"}");
request.addHeader("content-type", "application/json");
request.addHeader("Accept","application/json");
Please visit here for the details of API.

Usual way is to use a HashMap with Key-value pair as request parameters with Volley
Similar to the below example, you need to customize for your specific requirement.
Option 1:
final String URL = "URL";
// Post params to be sent to the server
HashMap<String, String> params = new HashMap<String, String>();
params.put("token", "token_value");
params.put("login_id", "login_id_value");
params.put("UN", "username");
params.put("PW", "password");
JsonObjectRequest request_json = new JsonObjectRequest(URL, new JSONObject(params),
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
//Process os success response
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.e("Error: ", error.getMessage());
}
});
// add the request object to the queue to be executed
ApplicationController.getInstance().addToRequestQueue(request_json);
NOTE: A HashMap can have custom objects as value
Option 2:
Directly using JSON in request body
try {
RequestQueue requestQueue = Volley.newRequestQueue(this);
String URL = "http://...";
JSONObject jsonBody = new JSONObject();
jsonBody.put("firstkey", "firstvalue");
jsonBody.put("secondkey", "secondobject");
final String mRequestBody = jsonBody.toString();
StringRequest stringRequest = new StringRequest(Request.Method.POST, URL, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Log.i("LOG_VOLLEY", response);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("LOG_VOLLEY", error.toString());
}
}) {
#Override
public String getBodyContentType() {
return "application/json; charset=utf-8";
}
#Override
public byte[] getBody() throws AuthFailureError {
try {
return mRequestBody == null ? null : mRequestBody.getBytes("utf-8");
} catch (UnsupportedEncodingException uee) {
VolleyLog.wtf("Unsupported Encoding while trying to get the bytes of %s using %s", mRequestBody, "utf-8");
return null;
}
}
#Override
protected Response<String> parseNetworkResponse(NetworkResponse response) {
String responseString = "";
if (response != null) {
responseString = String.valueOf(response.statusCode);
}
return Response.success(responseString, HttpHeaderParser.parseCacheHeaders(response));
}
};
requestQueue.add(stringRequest);
} catch (JSONException e) {
e.printStackTrace();
}

this is an example uses StringRequest
StringRequest stringRequest = new StringRequest(Method.POST, url, listener, errorListener) {
#Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> map = new HashMap<String, String>();
map.put("api_key", "12345");
map.put("ts_code", "12345");
return map;
}
};

OkHttpClient okHttpClient = new OkHttpClient();
ContentValues values = new ContentValues();
values.put(parameter1Name, parameter1Value);
values.put(parameter2Name, parameter2Value);
RequestBody requestBody = null;
if (values != null && values.size() > 0) {
FormEncodingBuilder formEncoding = new FormEncodingBuilder();
Set<String> keySet = values.keySet();
for (String key : keySet) {
try {
values.getAsString(key);
formEncoding.add(key, values.getAsString(key));
} catch (Exception ex) {
Logger.log(Logger.LEVEL_ERROR, CLASS_NAME, "getRequestBodyFromParameters", "Error while adding Post parameter. Skipping this parameter." + ex.getLocalizedMessage());
}
}
requestBody = formEncoding.build();
}
String URL = "http://example.com";
Request.Builder builder = new Request.Builder();
builder.url(URL);
builder.post(requestBody);
Request request = builder.build();
Response response = okHttpClient.newCall(request).execute();

Adding POST parameters to Android Volley JsonObjectRequest

Good afternoon everyone
I did a volley connection to my localserver. It turns out, the connection works fine but my parameters are not getting accepted in my MysqlPHP script.
I believe the parameters are not getting sent correctly.
Here is the code
try {
RequestQueue jr = Volley.newRequestQueue(this);
HashMap<String, String> params = new HashMap<String, String>();
params.put("username", username);
params.put("password", password);
Log.d("The paramet ready", "Ready to go");
JsonObjectRequest jsonObject = new JsonObjectRequest(Request.Method.POST, url, new JSONObject(params),
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
Log.d("The response", response.toString());
progressDial.hide();
JSONArray json = null;
try {
json = response.getJSONArray("result");
} catch (JSONException e) {
e.printStackTrace();
}
try {
if (json.getString(0).equalsIgnoreCase("0")) {
Log.d("JsonString: -> ", json.toString());
progressDial.hide();
toast();
} else {
startagain();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
progressDial.hide();
}
}
);
jr.add(jsonObject);

I encountered a similar issue. I had a server API which returned a JSON Object response, so JsonObjectRequest was the go-to request type, but the server didn't like that my body was in JSON format, so I had to make a few changes to my request.
Here's what I did (adapted to your code):
JsonObjectRequest jsonObject = new JsonObjectRequest(Request.Method.POST, url, null,
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
Log.d("The response", response.toString());
progressDial.hide();
JSONArray json = null;
try {
json = response.getJSONArray("result");
} catch (JSONException e) {
e.printStackTrace();
}
try {
if (json.getString(0).equalsIgnoreCase("0")) {
Log.d("JsonString: -> ", json.toString());
progressDial.hide();
toast();
} else {
startagain();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
progressDial.hide();
}
}
)
{
#Override
public byte[] getBody()
{
try
{
final String body = "&username=" + username + // assumes username is final and is url encoded.
"&password=" + password // assumes password is final and is url encoded.
return body.getBytes("utf-8");
}
catch (Exception ex) { }
return null;
}
#Override
public String getBodyContentType()
{
return "application/x-www-form-urlencoded";
}
#Override
public Map<String, String> getHeaders() throws AuthFailureError
{
Map<String, String> headers = new HashMap<String, String>();
headers.put("Accept", "application/json");
return headers;
}
};
Here, I'm not sending any JSON Object as the post body, but instead, I'm creating the post body on my own, form url encoded.
I'm overriding the following methods:
getBody - I'm creating the body of the post exactly the way the server wanted it - form url encoded.
getBodyContentType - I'm telling the server what the content type of my body is
getHeaders - I'm telling the server to return the result in JSON format. This might not be necessary for you.

If your API return a JSON array, then you should use a JsonArrayRequest, not a JsonRequest.